]> git.proxmox.com Git - mirror_edk2.git/blame - SecurityPkg/Library/PlatformSecureLibNull/PlatformSecureLibNull.c
SecurityPkg Tpm2DeviceLibDTpm: Update enum type name to match the one in lib
[mirror_edk2.git] / SecurityPkg / Library / PlatformSecureLibNull / PlatformSecureLibNull.c
CommitLineData
0c18794e 1/** @file\r
a7450323 2 NULL PlatformSecureLib instance does NOT really detect whether a physical present \r
3 user exists but return TRUE directly. This instance can be used to verify security\r
4 related features during platform enabling and development. It should be replaced\r
5 by a platform-specific method(e.g. Button pressed) in a real platform for product.\r
0c18794e 6\r
c99bcf3d 7Copyright (c) 2011 - 2016, Intel Corporation. All rights reserved.<BR>\r
0c18794e 8This program and the accompanying materials \r
9are licensed and made available under the terms and conditions of the BSD License \r
10which accompanies this distribution. The full text of the license may be found at \r
11http://opensource.org/licenses/bsd-license.php\r
12\r
13THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
14WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
15\r
16**/\r
17\r
c99bcf3d
LG
18BOOLEAN mUserPhysicalPresence = FALSE;\r
19\r
0c18794e 20/**\r
21\r
ecc722ad 22 This function provides a platform-specific method to detect whether the platform\r
23 is operating by a physically present user. \r
24\r
25 Programmatic changing of platform security policy (such as disable Secure Boot,\r
26 or switch between Standard/Custom Secure Boot mode) MUST NOT be possible during\r
27 Boot Services or after exiting EFI Boot Services. Only a physically present user\r
28 is allowed to perform these operations.\r
29\r
0c18794e 30 NOTE THAT: This function cannot depend on any EFI Variable Service since they are\r
31 not available when this function is called in AuthenticateVariable driver.\r
ecc722ad 32 \r
33 @retval TRUE The platform is operated by a physically present user.\r
34 @retval FALSE The platform is NOT operated by a physically present user.\r
0c18794e 35\r
36**/\r
37BOOLEAN\r
38EFIAPI\r
ecc722ad 39UserPhysicalPresent (\r
0c18794e 40 VOID\r
41 )\r
42{\r
c99bcf3d
LG
43 return mUserPhysicalPresence; \r
44}\r
45\r
46\r
47/**\r
48 Save user physical presence state from a PCD to mUserPhysicalPresence.\r
49\r
50 @param ImageHandle ImageHandle of the loaded driver.\r
51 @param SystemTable Pointer to the EFI System Table.\r
52\r
53 @retval EFI_SUCCESS PcdUserPhysicalPresence is got successfully.\r
54\r
55**/\r
56EFI_STATUS\r
57EFIAPI\r
58PlatformSecureLibNullConstructor (\r
59 IN EFI_HANDLE ImageHandle,\r
60 IN EFI_SYSTEM_TABLE *SystemTable\r
61 )\r
62{\r
63\r
64 mUserPhysicalPresence = PcdGetBool(PcdUserPhysicalPresence);\r
65\r
66 return EFI_SUCCESS;\r
0c18794e 67}\r